fix(managed_agents): align memory cookbook with CMA series conventions

- Guard the session.status_idle break on stop_reason.type == "end_turn"
  so the pattern is safe to copy into custom-tool agents
- Import wait_for_idle_status from utilities and call it before each
  sessions.archive() to absorb the SSE-vs-status race
- Use environments.archive instead of environments.delete
- Define MODEL via the COOKBOOK_MODEL env var like the other CMA
  notebooks and pass it to agents.create
- Seed cell: capture the return, print the seeded path, and note that
  it must run before the cleanup cell that deletes the store

https://claude.ai/code/session_01VkfVPdiJTWVh6Vj5owqRXH

Author: claude

managed_agents/CMA_remember_user_preferences.ipynb

@@ -59,7 +59,12 @@
    "execution_count": 1,
    "outputs": [],
    "source": [
+    "import os\n",
+    "\n",
     "from anthropic import Anthropic\n",
+    "from utilities import wait_for_idle_status\n",
+    "\n",
+    "MODEL = os.environ.get(\"COOKBOOK_MODEL\", \"claude-sonnet-4-6\")\n",
     "\n",
     "client = Anthropic()"
    ]
@@ -111,7 +116,8 @@
     "                    print(f\"  [memory] {event.name}: {target}\")\n",
     "\n",
     "            elif event.type == \"session.status_idle\":\n",
-    "                break\n",
+    "                if event.stop_reason and event.stop_reason.type == \"end_turn\":\n",
+    "                    break\n",
     "\n",
     "    return \"\".join(reply_parts)"
    ]
@@ -187,7 +193,7 @@
     "\n",
     "agent = client.beta.agents.create(\n",
     "    name=\"Personal Shopper\",\n",
-    "    model=\"claude-sonnet-4-6\",\n",
+    "    model=MODEL,\n",
     "    system=(\n",
     "        \"You are a personal shopping assistant for a retail brand. \"\n",
     "        \"Help the customer find products that match their taste and budget, \"\n",
@@ -474,15 +480,17 @@
    "execution_count": 9,
    "outputs": [],
    "source": [
-    "client.beta.memory_stores.memories.create(\n",
+    "# Run before the cleanup cell below; `store` is deleted there.\n",
+    "seeded = client.beta.memory_stores.memories.create(\n",
     "    store.id,\n",
     "    path=\"/purchase-history.md\",\n",
     "    content=(\n",
     "        \"## Recent purchases\\n\"\n",
     "        \"- Canvas tote, olive, $89 (Jan 2026)\\n\"\n",
     "        \"- Wool beanie, rust, $34 (Dec 2025)\\n\"\n",
     "    ),\n",
-    ")"
+    ")\n",
+    "print(f\"Seeded {seeded.path}\")"
    ]
   },
   {
@@ -542,11 +550,13 @@
    "execution_count": 10,
    "outputs": [],
    "source": [
+    "wait_for_idle_status(client, session_one.id)\n",
     "client.beta.sessions.archive(session_one.id)\n",
+    "wait_for_idle_status(client, session_two.id)\n",
     "client.beta.sessions.archive(session_two.id)\n",
     "client.beta.memory_stores.delete(store.id)\n",
     "client.beta.agents.archive(agent.id)\n",
-    "client.beta.environments.delete(environment.id)"
+    "client.beta.environments.archive(environment.id)"
    ]
   },
   {